Five defenders in 2-3 zone shape. No offence; coach moves around the perimeter calling positions. Zone shifts as a unit to match imaginary ball.
Most zones fail because players don't move together. This ingrains the synchronised shift.
Move on the pass, not the dribble.
Talk constantly, every shift announced.
Opposite-side defenders cover the lane.
Forwards stay above the free-throw line.
Centre is the anchor, always in the paint.
Live ball-handler around perimeter. Defence must deflect 5 passes. Switch zones every 30 seconds.